Ptolemy, in his treatise Optics, held an extramission-intromission idea of vision: the rays (or flux) in the eye shaped a cone, the vertex being within the attention, and the base defining the Visible industry. The rays had been delicate, and conveyed information and facts back again for the observer's intellect https://communications-system77306.actoblog.com/30476276/sound-system-things-to-know-before-you-buy